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Point Contact Diode
Apr 10, 2017

The point contact diode is formed by pressing a metal needle on a single crystal sheet of germanium or silicon material, and then through the current method. Therefore, the PN junction with small electrostatic capacity, suitable for high-frequency circuits. However, comparing with the surface knot type, the forward characteristic and the inverse characteristic of the point-contact diode are poor, so the large current and rectification cannot be used. Because the construction is simple, so the price is cheap.